For the small space, different professions have different ways of handling it.
For example, Mages usually use a Mage Tower as the core for control. However, the Silver Tower is more familiar with these things since it's such a large Silver Tower, itself formed by gathering small spaces.
Zhao Guang exchanged for some methods from the Silver Tower, just right for this task.
Subsequently, a very small special structure was manufactured under the function of a Magic Doll.
This time Zhao Guang did not use people, but employed a Magic Doll, as this small space is his private territory, a very secret place. Unless he finds a better small space in the future, Zhao Guang would never allow anyone else to interfere here.
The simplified special magic core is not a Mage Tower, just a very small building.
Following that, various Runes need to be set within the entire space for concealment and reinforcement.
